including the bruins game, the red sox game, and hopefully, the big apple circus. >> a big and happy, and hopefully, relief-filled day for boston. elizabeth vaas reporting from copley square. let's talk about the brothers tsarnaev. for years, they seemed to be productive members of the boston community. so what changed? how did they get radicalized? pierre thomas joins us with more. pierre, good morning to you. >> reporter: in many ways, this is the quest for the american dream turned nightmare. immigrants of the russian caukasus, the brothers came to the u.s. with their parents, attempting refugee status and thrived. >> the high school student i knew and my classmates knew is the exact opposite of the person that's been committing these crimes. >> reporter: their mother, speaking to russian television, refuses to believe her sons are vicious killers. >> it's impossible. impossible for them -- for both of them to do such things. i'm telling that this is a setup. >> reporter: older brother, tamerlan, 26, was a star athlete and pianist. also a champion golden gloves boxer. with dreams o